Democratic state Rep. Andy Schor of Lansing and Michigan's largest teachers’ union say the open-carry “loophole” must be closed inside schools after the massacre at a Connecticut school. They held a news conference Thursday calling for passage of legislation.

Gov. Rick Snyder in December vetoed legislation that would have allowed concealed weapons in gun-free zones and prohibited openly carried weapons. He says he wants schools to be able to ban guns completely from their premises if they see fit.